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Short answer: There is none.
There is not a least common factor of a single number, such as 1, because there cannot be any form of common factor without two or more numbers to compare. Common factors are factors that the numbers being compared have in common. The least common factor is the smallest factor that all the numbers being compared have in common. Thus, since there are not two or more numbers to compare, there is not a least common factor.
Note: The least common factor of two or more positive integers is 1.
What else can I help you with?
What is the least common factor of 9 and 4?
The least common factor of 4 and 9 is is: 1
What is the least common factor of 5 and 6?
The least common factor is: 1(The least common factor of any set of integers is 1.)The least common factor of any set of positive integers is 1.
What is the least common factor of 20 and 30?
The least common factor of any set of numbers is 1.
What is the least common factor of 24 and 18?
The least common factor is: 1
What is the least common factor of 24 18 and 30?
The least common factor is 1. (The least common factor of any two or more positive integers is always 1.)
What is the least common factor of 8 and 28?
The least common factor is 1.The least common factor of any set of integers is 1.
What is the least common factor of 21 and 6?
The least common factor is: 1
What is the least common factor of 126 and 999?
The least common factor of any set of numbers is 1.
What is the Least common factor of 12 and 20?
The least common factor is 1 but the highest common factor is 4
Least common factor of 12 and 16?
The least common factor of any set of numbers is 1.
What is the least common factor for 30?
The least common factor is: 1
What is the least common factor of 6 and 8 and 9?
The least common factor is 1. the least common MULTIPLE is 72
